TECHNET Archives

October 1999

TechNet@IPC.ORG
Options: Use Proportional Font
Show HTML Part by Default
Show All Mail Headers

Message: [<< First] [< Prev] [Next >] [Last >>]
Topic: [<< First] [< Prev] [Next >] [Last >>]
Author: [<< First] [< Prev] [Next >] [Last >>]

Print Reply
Subject:
Re: 4-layer vs 2-layer costing
From:
Franklin <[log in to unmask]>
Reply To:
TechNet E-Mail Forum.
Date:
Tue, 26 Oct 1999 14:35:38 -0500
Content-Type:
multipart/alternative
Parts/Attachments:
text/plain (3064 bytes) , text/html (6 kB) 
Mike,

Just a thought here, would it be best to design a board for proper functioning during it's end use, or to make it easier for the fabricator or assembler (i.e. easy access to areas that may require rework)

I'm of the opinion design input should never result correctable conditions in the output, i.e. don't design band-aids into boards.

And this coming from someone at a board house, whats this silly world coming to.

Just a thought is all.

Franklin D Asbell
Network Circuits, Inc.
Irving, Texas



-----Original Message-----
From: Keel, Mike <[log in to unmask]>
To: [log in to unmask] <[log in to unmask]>
Date: 26 October, 1999 2:01 PM
Subject: Re: [TN] 4-layer vs 2-layer costing


Jim

If you put power and ground on the outside of the board;

What happens when you have to re-work the signal layers ?

(Not that signal layers always require re-work)

Good Luck

M Keel
San Diego


                -----Original Message-----
                From:   Jim Mathis [mailto:[log in to unmask]]
                Sent:   Tuesday, October 26, 1999 7:32 PM
                To:     [log in to unmask]
                Subject:        [TN] 4-layer vs 2-layer costing

                Assuming all other considerations being equal (size, # of
holes, hole sizes,
                etc.), what is the typical cost adder for going 4-layer from
2-layer?  1.5X,
                2X. etc?

                Also, in an EMI-sensitive environment, how would you
recommend the layer
                stack-up?  Signal 1, Ground, Supply, Signal 2  OR Ground,
S1, S2, Supply?  OR
                something else?

                Thanks.


##############################################################
                TechNet Mail List provided as a free service by IPC using
LISTSERV 1.8c

##############################################################
                To subscribe/unsubscribe, send a message to [log in to unmask]
with following text in
                the body:
                To subscribe:   SUBSCRIBE TECHNET <your full name>
                To unsubscribe:   SIGNOFF TECHNET

##############################################################
                Please visit IPC web site
(http://www.ipc.org/html/forum.htm) for additional
                information.
                If you need assistance - contact Gayatri Sardeshpande at
[log in to unmask] or
                847-509-9700 ext.5365

##############################################################

##############################################################
TechNet Mail List provided as a free service by IPC using LISTSERV 1.8c
##############################################################
To subscribe/unsubscribe, send a message to [log in to unmask] with following text in
the body:
To subscribe:   SUBSCRIBE TECHNET <your full name>
To unsubscribe:   SIGNOFF TECHNET
##############################################################
Please visit IPC web site (http://www.ipc.org/html/forum.htm) for additional
information.
If you need assistance - contact Gayatri Sardeshpande at [log in to unmask] or
847-509-9700 ext.5365
##############################################################

ATOM RSS1 RSS2